Full Ceramic Sealed Ball Bearing Zirconia ZrO2 21.5x31x7mm Full Complement 2RS High-Precision Bearing For Lightweight Durable Smooth Operation In Precision Machinery And Upgraded Applications

Premium Ceramic Ball Bearing MR3121-2RS 21.5x31x7 (Single)
✔️ Full ceramic ZrO2 seal, 21.5mm ID, 31mm OD, 7mm width

This full ceramic MR3121-2RS bearing uses zirconia (ZrO2) for the balls and races, delivering dry-running performance with excellent wear resistance. Sized at 21.5 x 31 x 7 mm, it’s a solid choice for precision machinery, robotics, CNC tooling, and medical devices where low friction and long life matter.

✅ Inner diameter: 21.5 mm (0.846 in)
✅ Outer diameter: 31 mm (1.22 in)
✅ Width: 7 mm (0.276 in)
✅ Material: ZrO2 ceramic, full-complement, PTFE seals

💡 What is a ceramic sealed ball bearing used for in precision machinery and automation?

They are handy in automated systems where smooth, accurate motion matters.

- pillow block bearing applications in robotics and automation - sealed ceramic bearings for high-speed spindles and clean environments - zirconia ceramic bearings offer low friction and corrosion resistance